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I.DRR

Integrated Driver Response Research

  • Based off of the latest scientific studies available
  • Provides annotated notes from 34 scientific studies pertaining to driver response
  • Analysis features specific to your case:
    • Perception Response Time Analysis (PRT)
    • Path Intrusion Adjustment-2-Baseline
    • Night Time Analysis including headlight beam mapping
  • Includes Scientific Justification for many of the worksheets
  • Easy to follow colorcoding system to see where to input and where output is generated

Taking a look inside I.DRR:

Path Intrusion: Adjustment-to-Baseline

Path Intrusion Adjustment-to-Baseline is one of the most popular uses of I.DRR.
Path Intrusion A-2-B utilizes 22 studies for this analysis.

What is an Adjustment To Baseline?

Adjustment to baseline (A-2-B) is a method for estimating driver response times. A2B is based upon the theory that response times are additive. Additivity suggests response time increase or decrease by a constant amount (a linear rate) as the response complexity increases and decreases.

So how is A-2-B applied to Path Intrusions?

In this program, analogous research studies are the baseline. When comparing studies, particularly the methodology and reported results, response times changed when the methodology changed. Further, an understanding of the amplitude of the response time change was seen. Applying this knowledge to a forensic setting, if the methodology of the study differs from the scenario being examined, adjustments can be made based upon how response times have changed in past research.

Object Entering Headlight Beam Analysis

This module in I.DRR is designed for several different analysis types:
  1. To offer the user results from measuring the headlight beam of vehicles with similar headlight bulbs. This information will allow the user to determine the time from when the object entered the headlight beam up until the point the driver began to skid or steer (the perception-response time from when the pedestrian, bike or object entered the highlight beam).
  2. Performing time and distance analysis if the user is investigating a pedestrian or bicycle crash
  3. Headlight beam analysis only

Object Entering Headlight Beam Analysis offers the user several different headlight beam choices including but not limited to the 9000 series, H series, high beam headlights and Halogen headlights. This analysis worksheet also shows you the path of the intruding object, pedestrian or bicyclist.